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Guess this is the best place to put this as the with out the props,the aircraft would have difficulty flying

My sources (plans/technical drawing), state that the Diameter for the Mk III (Pegasus XVIII)propeller is 12 feet 6 inches. Measuring between cut way plans and drawings this about right.

I have come across some modelling sites selling after market propellers etc that claim that for the Mk I-III, it should be 13 feet 6 inches. It seems way to large for me as a propeller diameter for a Sunderland.

Hi guys. I can't find the diameter, but apparently from Mk2 onwards (Pegasus 18s) the propellers were de Havilland constant-speed units. Apparently DH was making Hamilton props under licence from 1935. You may already know this site; it has everything you want to know about props - except the diameters! However, I'm sure the webmaster could answer your questions.

Thanks for that, the Sunderland pilot told me and also in his commentarystated that on the Mk III he flew, if an engine was lost, you could not featherthe prop (as it was constant speed) and it made for hard flying. Some aircraft and crews were lostbecause of that.

HI FOLKS - AS FAR AS I CAN REMEMBER THE PROPS WE FITTED AT SHORTS BELFAST TO ALL MK V WERE HAMSTD. AND MARKED AS SUCH - REMEMBER P+W OWNED HAMSTD - I AM SURE THEY WERE 12'6" DIA. - THATS WHY 10 SQDN. R.A.A.F. WERE PUSHING TO HAVE SAME ENGINES / PROPS AS THEIR PBY CATS - THANX J.C.